#2 #5 WA了

代码如下qwq：

#include <cstdio>
int n, m, maxn, minn, t;
double maxx, sum;
bool ma, mi;
int main(){
	scanf("%d%d", &n, &m);
	for(int j = 1; j <= n; j++){
		maxn = 0; minn = 50; sum = 0;
		for(int i = 1; i <= m; i++){
			scanf("%d", &t);
			if(t > maxn){
				maxn = t;
			} else if(t < minn){
				minn = t;
			}
			sum += t;
		}
		sum -= maxn; sum -= minn; sum /= m - 2;
		if(sum > maxx){
			maxx = sum;
		}
	}
	printf("%.2lf", maxx);
	return 0;
}